$MeshFormat
4 0 8
$EndMeshFormat
$Entities
0 0 0 1
0 -0.5 0 -0.5 0.5 3 0.5 0 0
$EndEntities
$Nodes
1 5
0 3 0 5
1 0.5 0 -0.5
2 0.5 0 0.5
3 -0.5 0 0.5
4 -0.5 0 -0.5
5 0 3 0
$EndNodes
$Elements
1 2
0 3 4 2
1 4 2 5 3
2 4 2 1 5
$EndElements
$Surface
6
5 2 1
5 3 2
5 4 3
5 1 4
4 1 2
3 4 2
$EndSurface